Developers' Notes: Three OS and Embracing Open Source Swift

In just half a month, the world's two greatest technology companies held developer conferences one after another. The two developer conferences were completely different in style, projecting the two companies' completely different goals and temperaments. If Google's IO conference is a poet's declaration to change the world, Apple's WWDC is more like a British butler, gentle and elegant but ambitious. Whether it is a declaration to change the world or the ambition of a butler, it is inseparable from hundreds of millions of developers. 51CTO Mobile Channel interprets the ambition of Apple's butler at WWDC

No.1 iOS 9

This time iOS 9 has been completely redesigned, with comprehensive improvements starting from the top level of the entire system, making the entire system smarter; it optimizes the various apps you frequently use, and the integration with iPad will also be more complete.

When you pick up your iPhone in the morning, it will recommend apps to open based on your daily habits. If you add an address to an event in the Calendar app, your iPhone will remind you when to leave... Also worth mentioning is the search in iOS9, which can search for event schedules, Netflix movies, apps... It takes care of everything for you like a butler.

In addition, Apple has opened up the long-awaited Siri API. Siri has officially landed on the mobile platform as early as the iOS 5 era, and now it has been used in a wide range of devices from iPad Air 2 to iPhone 4S. Developers have always hoped to introduce its functions into their own applications.

For users and developers, iOS 9 redesigned the switching between apps. The Slide Over feature allows you to open a second app without leaving the current app. The Picture in Picture feature can reduce the size of the video so that you can watch the video while replying to emails. The Split View feature allows two apps to be opened and run in parallel on the same screen. So it seems that iPad Pro is coming. The Picture in Picture, Slide Over and Split View features will all open APIs to developers.

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iOS 9 will provide developers with many new APIs. With GamePlayKit, Model I/O and ReplayKit, the new APIs will bring more fun iOS games.

No.2 OS X

The update rate of OS X Yosemite has set a new record in the history of personal computer operating systems.

OS X El Capitan improves the system's internals to make it more powerful, allowing you to do everyday things in a smarter way. New gestures make many quick actions easier, such as deleting a message from the Mail app. The pinned tab feature on Safari allows you to keep frequently visited websites open and updated.

Spaces Bar allows you to easily create multiple screens and get more working space.

Split View automatically aligns two apps side by side to share a single screen, making full use of every pixel on your Mac display.

Metal is a core graphics technology that gives apps faster access to the graphics processor.

The beta of OS X El Capitan is available today for developers, and will be available to the public this summer.

No.3 watchOS 2

It can be said that the current Apple Watch and watchOS experience is very bad. The new version of watchOS will bring a variety of native apps designed specifically for Apple Watch.

Previously, many apps on Apple Watch needed the help of iPhone to run; with watchOS 2, they can run entirely on Apple Watch. Developers can access more hardware features including speakers, video, accelerometer, Taptic Engine, and Digital Crown, including microphones. The watchOS 2 preview for developers is available today.

No.4 Embrace open source Swift

Swift is the underlying development language for iOS and OS X, and it opens up new possibilities for writing amazing apps. Later this year, Swift will be open source and available for iOS, OS X, and Linux. The developer beta of iOS 9 is available today, and the public beta will be available in July.